Carbon-remover



UNITED STATES PATENT OFFICE.

ABRAHAM LOUIS METZ AND GILBERT O. IBERGERON, OF NEW ORLEANS, LOUISIANA.

' cmon-nnmovnn.

No Drawing.

To all whom it may concern: Be it knownthat we, ABRAHAM L. Mn'rz, andGILBERT O. BERGERON, citizens of the United States, residing at NewOrleans, 1 n the parish of Orleans and State of Louisiana, have inventedcertain new and useful Improvements in Carbon-Removers, of which thefollowing is a specification.

It is well known that in the operation of internal combustion engines itis necessary periodically to remove the layer or film of carbon which isdeposited on the cylinder walls, piston, valves, and spark plug, inorder to kee the engine in good running condition. eretofore this hasusually been done by removing the cylinder head and scraping off thecrust of carbon with a sharp instrument. remove this carbon deposit byintroducing into the cylinder a liquid compound which would dislodge thecarbon. The compounds thus far proposed'smowever, have been impracticalfor the purpose, some because they were inefi'ective in dislodging theentire crust of carbon, others because they were too slow to bepreferable over the old scraping method, and others because they tendedtoward a corrosive or other injurious effect upon the metals of theparts with which they came into contact.

It is the object of our invention to pro duce a novel carbon-removingcompound which will attack the film of carbon and dislodge it in a veryshort space of time, more quickly than any compound now known; whichwill be eificient and thorough in its action and y will leave the coatedsurface clean and bright; which will not have any corrosive or injuriousefi'ect upon the metals; and which requiresno experience or skill to useit properly and effectively.

A further aim of the invention is to produce a carbon remover which isso compounded as to raise the flash-point so as to minimize the dangerfrom imfiammability in handling or storage of the compound.

The deposit of carbon in an engine is due partially to incompletecombustion and partially to the cracking or splitting of the oil It hasbeen proposed to- Specification of Letters Patent. Patented June 24,1919,

Application filed January 18, 1918. Serial No. 212,482.

(either fuel or lubricating oil or both) which cracking results in theforming of a film of oil about the fine carbon particles and causingthem to adhere together and to the exposed surfaces in the combustionchamber. The continuing action forms a coating of gradually increasingthickness which is hardened and compacted by the high temperature andpressure in the combustion chamber.

A compound embodying our invention is a neutral volatile solvent of oilsand has a high vapor tension and pressure which becomes greater as theengine is heated. It is highly penetrating and enters the interstices ofthe carbon layer and permeates the latter and dissolves the molecularfilm of oil that causes the carbon particles to cohere and to adhere-tothe exposed surfaces in the combustion chamber. the action of ourcompound 'upon the oil film, the carboncrust is reduced to a finelycomminu'ted condition and, assisted by the heat in the combustionchamber, is changed into a dry powder of soot-like fineness,-

passages when the engine is op- As a result of i half in volume ispreferably an alcoholic .ingredient, the lower alcohols of the paraffinseries, such for example, as Wood alcohol or denatured ethyl alcohol. Arelatively small amount of acetone or its equivalent is included andalso a small quantity of carbontetra-chlorid Or the poly-chloroderivatives of ethylene and ethane, such as tetra-chloroethylene ortetra-chloro-ethane is employed. Carbon-tetra-chlorid is a highlypenetrating oil solvent, and it has the further character istic ofraising the flash-point of the compound, the ingredients of majorquantity, that is, the benzolic and alcoholic ingredients referred to,being of very low flashpoint. By raising the flash-point, theslicetiveness of the compound is not impaired but on the other hand isimproved, and at Benzol parts. Wood alcohol 4:0 Acetone 4:Carbon-tetra-chlorid l Naphthyl-methyl-ether or naphthyl ethyl-ether 0.1 Malachite green A trace. I

Another illustrative compound may com- .prise:

Petroleum ether; 55 parts.

Methyl alcohol 35 Acetone 5 Carbon-tetra-chlorid 2 Naphthyl-methyl-etheror naphthyl-ethyl-ether .0. 1 Malachite green A trace.

Another illustrative compound may comprise: Benzol or petroleum ether 55parts.

. Denatured ethyl alcohol 4:0 Acetone 4 Carbon-tetra-chlorid 1 Malachitegreen or naphthol green A trace.

Another illustrative compound may comprise: K

Benzol or petroleum ether 50 parts.

Denatured ethyl alcohol or wood alcohol 40 Acetone 5 Tetra -chloroethylene or tetra chloro-ethane 4' Naphthyl-methyl-ether ornaphthyl-ethyhether 0.1 Malachitegreen A trace.

-We have found by eaperiments that the geroportions of the several inedients may varied somewhat and stil give. the desired results, Thespecific formula which we have found preferable and most efiicient,however, is the following:

Benzol 55 parts.

In use, a quantity of the compound is introduced into the cylinders of.the engine in any suitable manner as through the pet cook or throughthe spark plug hole after removing the spark plug, and While this may bedone when the engine iscold the action of the compound is expedited ifit is introduced when the engine is hot or warm. In a short time thecarbon crust will be disintegrated by the liquid and the vaportherefrom, and the engine may then be started up in the usual way. Thedislodged carbon will be discharged through the exhaust'passage in theform of fine powder or soot,

- 1eaving the surfaces in the combustion chamber clean and free fromincrustation. If it is merely desired to clean the spark plugs, they maybe removed from the cylinders and immersed in a quantity of the liquidcompound in a receptacle for a short time.

We claim as our invention: 1. A carbon removlng compound comprising abenzolic oil solvent forming about half 7 in volume of the compound, analcoholic oil solvent forming the major portion of the remaining half involume of the compound, a relatively small quantity of acetone, arelatively small quantity of carbon ,tetra chlorid, an extremely smallquantity of naphthyl-methyl-ether, and an extremely small quantity ofmalachite green.

1 tone, and a relatively small quantity of car bOn-tetra-Chlorid. 3. Acarbon removing com-pound comprismg Benzol, about Q. 55 pal ts.

Wood alcohol, about 40 Acetone, about- 4 Carbon-tetra-chlorid, about 1Naphthyl-methyl-ethe'r, about--- 0.1 Malachlte green. A trace.

In testimony whereof we have hereunto set our hands. 7

ABRAHAM LOUIS METZ. GILBERT O. BERGERON.

. Gorre ctien in Letters Peten t-Noi 1,307,562.

. It is hereb certified that in Letters Patent No, 1,307,562, grantedJune 24,1919, upon the application ef Abraham Leuis Metz aiid-Gilbert 0.BergeroniefiNew Orleans, Louisiana, for an improvement inCarbbn-Removers, .an error appears in the printed specificationrequiring correction as iollowsz Page 2, tnu'd fermula,

after line 43, insert the words end figures, Naphth'yZ-methyZ-ether er?napkthylathyl-ether-OJ part; said that the said Letters Patent should-beread with this correction" therein thet-th'e same may conform te therecord of the case in the Patent Qfiiee. r I

Signed and 'sealed this 15th day of July, A. 1)., 1919.

F. WHITEHEAD,

[smihl R.

Acting Omhmissioner of Patents;

